<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>字体</title>
    <style>
        p.serif{font-family:"Times New Roman",Times,serif;}
        p.sansserif{font-family:Arial,Helvetica,sans-serif;}
    </style>
</head>
<body>
<p class="serif">这一段的字体是 Times New Roman </p>
<p class="sansserif">这一段的字体是 Arial.</p>
</body>
</html>
